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Dec 21, 2021
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The United States Naval Observatory Library & Archives collection documents the work of one of the United States’ oldest scientific institutions. Digitized material from this collection provides an in-depth historical look at the Naval Observatory’s astronomical mission.
Topics: astronomy, navigation, timekeeping, American history, science, astronomers, naval officers,...
United States Naval Observatory Library & Archives
Dec 20, 2021 United States Naval Observatory
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A moving wire micrometer, used to measure the separation and position angle of double stars, planetary satellites, and asteroids. Possibly used with the 26-inch and 12-inch Refractors at the United States Naval Observatory, p. 61 n. 13. USNOA-2021-015 USNO Glass Plate Publication Images Plate 165
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 20, 2021 United States Naval Observatory
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A moving wire micrometer, used to measure the separation and position angle of double stars, planetary satellites, and asteroids. Possibly used with the 26-inch and 12-inch Refractors at the United States Naval Observatory. USNOA-2021-015 USNO Glass Plate Publication Images Plate 164
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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New Electric Driving Clock photo tel. from west side, May 1921, p. 37 n. 15 v. 10. USNOA-2021-015 USNO Glass Plate Publication Images Plate 180
Topics: USNO, astronomical instrument, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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New Electric Driving Clock photo tel. from West side, May 1921 p. 37 n. 14 v. 10 USNOA-2021-015 USNO Glass Plate Publication Images Plate 179
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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New Electric Driving Clock, photo tel. May, 1921, p. 37 n. 13 v. 10. USNOA-2021-015 USNO Glass Plate Publication Images Plate 178
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Measuring Engine by Albert G. Isle, instrument maker at United States Naval Observatory, June 18, 1931 (J.A.L.) p. 37 n. 10 v. 10 USNOA-2021-015 USNO Glass Plate Publication Images Plate 177
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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12" Equatorial with Mr. John C. Hammond, p. 5 n. 9 v.2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 175
Topics: USNO, astronomical instruments, astronomer, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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12-inch Equatorial Position Indicators + R.A. Microscope, p. 45 n. 7 v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 174
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Instrumental levels, p. 49 n. 9 v. 12 USNOA-2021-015 USNO Glass Plate Publication Images Plate 173B
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Instrumental levels, p. 49 n. 9 v. 12 USNOA-2021-015 USNO Glass Plate Publication Images Plate 173A
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Professor John R. Eastman, astronomer at United States Naval Observatory, p. 3 n. 18 v. 1. USNOA-2021-015 USNO Glass Plate Publication Images Plate 172
Topics: USNO, astronomer, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Lt. Louis M. Goldsborough, p. 5 n. 4 v. 2. USNOA-2021-015 USNO Glass Plate Publication Images Plate 171
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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9-inch Transit Circle instrumental levels, p. 47 n. 14. USNOA-2021-015 USNO Glass Plate Publication Images Plate 170
Topics: USNO, astronomical instruments, glass plates
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Collimating lens of Prime Vertical, 1903 Apr 24, p. 38 n. 36 v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 169
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Adjustable Screens of 9-inch Transit Circle, p. 47 n. 15 v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 168
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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French wireless party, part of observatory staff, and Superintendent Captain Joseph L. Jayne, April 2, 1923 p. 3 n. 10 v. 1. USNOA-2021-015 USNO Glass Plate Publication Images Plate 167
Topics: USNO, astronomers, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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International longitude party, 1914, p. 3 n. 8 v. 1. USNOA-2021-015 USNO Glass Plate Publication Images Plate 166
Topics: USNO, astronomers, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Zero Mark, p. 58 n. 1 v. 12 USNOA-2021-015 USNO Glass Plate Publication Images Plate 163B
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Zero Mark in clock room, p. 58 n. 3 v. 12 USNOA-2021-015 USNO Glass Plate Publication Images Plate 163A
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Experimented photographic transit by C.B. Watts, 1929-1930, p. 32 n. 39 v. 12 USNOA-2021-015 USNO Glass Plate Publication Images Plate 162
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Time Signal relay for giving long ticks used in time service, 1915-1920 USNOA-2021-015 USNO Glass Plate Publication Images Plate 161
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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10" Triple Photo lenses of photo tel. by G.H. Peters, set up for testing, May 14, 1911, p. 50 n. - v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 160
Topics: USNO, astronomical instruments, lens, objectives, glass plates
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Mercury Kerosene Thermostat, 1912 Mar 22, p. 38 n. 31 v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 159
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Portrait of Professor Stimson J. Brown, former Director of the United States Naval Observatory,  1899, Dec p. 3 n. 11 v. 1 USNOA-2021-015 USNO Glass Plate Publication Images Plate 158B
Topics: USNO, astronomer, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Portrait of Professor Stimson J. Brown, former Director of the United States Naval Observatory,  1899, Dec p. 3 n. 11 v. 1 USNOA-2021-015 USNO Glass Plate Publication Images Plate 158A
Topics: USNO, astronomer, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Portrait of Professor Stimson J. Brown, former Director of the United States Naval Observatory, Dec. 1899 p. 3 n. 13 v. 1. USNOA-2021-015 USNO Glass Plate Publication Images Plate 157
Topics: USNO, astronomer, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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New Electric Driving Clock, photo tel. May 1921, large scale horizontal showing detail of East side, p. 37 n. 16 v. 10 USNOA-2021-015 USNO Glass Plate Publication Images Plate 156
Topics: USNO, astronomical instruments, clock, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Level Prime Vertical, 1923 July 16, p. 49 n. 10 v. 12 USNOA-2021-015 USNO Glass Plate Publication Images Plate 155
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Shortt Master + Slave Clock by Willis Dec. 10, 1930, p. 39 n. 3 v. 10. USNOA-2021-015 USNO Glass Plate Publication Images Plate 153
Topics: USNO, clock, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Mural Circle dismantled at old Observatory site, now in museum, p. 32 n. 38 v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 152
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Portrait of Admiral David Farragut, p. 5 n. 1 v. 2. USNOA-2021-015 USNO Glass Plate Publication Images Plate 151B
Topics: USNO, United States Navy, Civil War, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Magnetometer, p. 38 n. 32 v. 12. USNOA-2021-015 USNO Glass Plate Publication Images Plate 151A
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Meridian Mark USNOA-2021-015 USNO Glass Plate Publication Images Plate 150B
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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New Electric Driving Clock, photo tel. May 1921 from West Side of Pier by G.H. Peters, p. 37 n. 12 v. 10. USNOA-2021-015 USNO Glass Plate Publication Images Plate 150A
Topics: USNO, clock, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Rotating Pendulum Driving Clock photo tel. 1902, p. 37 n. 18 v. 10 USNOA-2021-015 USNO Glass Plate Publication Images Plate 149
Topics: USNO, astronomical instruments, clock, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Coelostat and Driving rod, p. 17 n. 7 USNOA-2021-015 USNO Glass Plate Publication Images Plate 148
Topics: USNO, astronomical instruments, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Property of Commander Styler. Two plates of a submarine C-2 p. 61 n. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 147
Topics: USNO, submarine, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Glass plate of unknown astronomical observations.  E 33-50" a plate of 40" AA p. 52 n. 20 USNOA-2021-015 USNO Glass Plate Publication Images Plate 146
Topics: USNO, astronomy, glass plate
United States Naval Observatory Library & Archives
Dec 17, 2021 United States Naval Observatory
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Portrait of Sir Isaac Newton, p. 27 n. 4 USNOA-2021-015 USNO Glass Plate Publication Images Plate 145
Topics: Isaac Newton, USNO, glass plate
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Lt. James Melville Gillis bust in library. Photo May 7, 1931 p. 5 n. 2 v. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 143A
Topics: USNO, Staff
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Birds eye view of the Observatory - slides p. 4 n. 3 v. 4 USNOA-2021-015 USNO Glass Plate Publication Images Plate 141
Topics: USNO, Buildings and Grounds
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Main Building. p. 9 n. 14 v. 4 USNOA-2021-015 USNO Glass Plate Publication Images Plate 140
Topics: USNO, Buildings and Grounds
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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William Harkness p. 5 n. 11 v. 2, p. 5 n. 10 v. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 138-139
Topics: USNO, Staff
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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J. Homer Lane p. 5 n. 13 USNOA-2021-015 USNO Glass Plate Publication Images Plate 137
Topics: USNO, Staff
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Capt C.H. Davis p. 3 n. 17 v. 1,  n. 16 v. 1. USNOA-2021-015 USNO Glass Plate Publication Images Plate 135, 136
Topics: USNO, staff
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Prof. A.N. Skinner, enlargement of a printed portrait in Mr. Burton's posession. May 1938 p. 5 n. 19 USNOA-2021-015 USNO Glass Plate Publication Images Plate 134
Topics: USNO, staff, astronomers
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Map of the grounds and surroundings of the Observatory p. 24 n. 3. USNOA-2021-015 USNO Glass Plate Publication Images Plate 133
Topics: USNO, Buildings and Grounds
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Main Building from North. Comdr Hayden in view, about 1904. p. 9 n. 16 v. 4 USNOA-2021-015 USNO Glass Plate Publication Images Plate 142
Topics: USNO, Buildings and Grounds
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Portrait of Simon Newcomb p. 7 n. 1. USNOA-2021-015 USNO Glass Plate Publication Images Plate 131
Topics: USNO, Portrait
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Graph Paper USNOA-2021-015 USNO Glass Plate Publication Images Plate 130
Topic: USNO
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Creller's Table for #855 and factor for use with plate reading table for use at Time Service p. 59 n. 17. USNOA-2021-015 USNO Glass Plate Publication Images Plate 129
Topics: USNO, Time Service
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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A Stand of trees  and snow seen through window p. 7 n. 23,  n. 24. Likely on the grounds of the Naval Observatory.  USNOA-2021-015 USNO Glass Plate Publication Images Plate 127, 128
Topics: USNO, buildings and grounds
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Recording thermometer used in clock vault 1920-1929. Designed by Chester B. Watts. USNOA-2021-015 USNO Glass Plate Publication Images Plate 125, 126
Topics: USNO, History of Science, Clocks, Scientific Instruments
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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Corona (Solar) Kepiang eclipse Jan 14-19 1926 65 ft camera p. 60 USNOA-2021-015 USNO Glass Plate Publication Images Plate 122, 123, 124
Topics: USNO, Solar Eclipse, 1926
United States Naval Observatory Library & Archives
Nov 24, 2021 United States Naval Observatory
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 The Moon, March 14-13h 40m enlarged direct in 8.5"x12 ft telescope on old dso plates into color screen exposed about 6 seconds image about 4.5" dia. p. 58 n. 6 v. 13 USNOA-2021-015 USNO Glass Plate Publication Images Plate 121
Topics: USNO, Moon, Astronomy
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Photoheliograph outside at the United States Naval Observatory, Nov. 6, 1903. Gabriel F. Coulon in photo. p. 51 n. 1 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 120
Topics: USNO, photoheliograph, astronomer, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Small Transit Instrument p. 37 n. 2 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 119
Topics: USNO, Transit Instrument, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Prime Vertical Transit Instrument about 1899 p. 49 n. 8 v. 9
Topics: USNO, Transit Instrument, Telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Prime Vertical Transit Instrument about 1907, p. 49 n. 3 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 117
Topics: USNO, Transit Instrument, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Photographic telescope, new 10" Triple lenses tubes under polar axis p. 50 n. 4 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 116
Topics: USNO, telescope lens, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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9" Transit Circle about 1895 p. 47 n. 7 v. 8 USNOA-2021-015 USNO Glass Plate Publication Images Plate 115
Topics: USNO, transit instrument, transit circle, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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12-inch Equatorial head and pier p. 45 n. 2 v. 8 USNOA-2021-015 USNO Glass Plate Publication Images Plate 114
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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12-inch Equatorial Refractor Telescope, p. 45 n. 4? v. 8 USNOA-2021-015 USNO Glass Plate Publication Images Plate 113
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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12-inch Equatorial Refractor Telescope circa 1900, p. 45 n. 5 v. 8 USNOA-2021-015 USNO Glass Plate Publication Images Plate 103
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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5-inch Broken back (prismatic) Broshear Comet Seeker Telescope, p. 17 n. 1 v. Xa USNOA-2021-015 USNO Glass Plate Publication Images Plate 111
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021
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Repsold Micrometer for 26-inch "Great Equatorial" Refractor Telescope, side view. 1916 March 16, p. 37 n. 20 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 110
Topics: USNO, micrometer, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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George Henry Peters standing at the eye end of the 12-inch Refractor Telescope at United States Naval Observatory, p. 7 n. 7 v. 3 USNOA-2021-015 USNO Glass Plate Publication Images Plate 109B
Topics: USNO, George Henry Peters, astronomer, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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George Henry Peters sitting at 12-inch Refractor Telescope at United States Naval Observatory, p. 7 n. 7 v. 3 USNOA-2021-015 USNO Glass Plate Publication Images Plate 109A
Topics: USNO, George Henry Peters, Refractor, Telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Dr. John Hammond standing in 12-inch Equatorial Dome, for 12-inch Refractor at United States Naval Observatory, p. 5 n. 8 v. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 108
Topics: USNO, equatorial room, telescope, astronomer
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Rear Admiral Asa Walker, former Superintendent of the United States Naval Observatory p. 7 n. 13 USNOA-2021-015 USNO Glass Plate Publication Images Plate 107B
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Rear Admiral Asa Walker, former Superintendent of the United States Naval Observatory p. 7 n. 13 USNOA-2021-015 USNO Glass Plate Publication Images Plate 107A
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Commodore Ten Eyck DeWitt Veeder, former Superintendent of the United States Naval Observatory p. 7 n. 12 v. 3 USNOA-2021-015 USNO Glass Plate Publication Images Plate 106
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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View of Main Building (Building 1) at United States Naval Observatory p. 11 n. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 105
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Captain Joseph L. Jayne was superintendent at USNO p. 5 n. 5 v. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 104B
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Captain Joseph L. Jayne was superintendent at USNO p. 5 n. 5 v. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 104A
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Micrometer and tail piece 26-inch "Great Equatorial" Refractor Telescope USNOA-2021-015 USNO Glass Plate Publication Images Plate 103
Topics: USNO, micrometer, tail piece, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Repsold micrometer for 26-inch "Great Equatorial" Refractor Telescope built in 1913 p. 37 n. 21 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 102
Topics: USNO, telescope, micrometer, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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10-inch Objective photo telescope mounted on instrument Dec. 13, 1911 p. 50 n. 7 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 101
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Photographic telescope looking upward p. 50 n. 6 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 100
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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10-inch photographic telescope eye end, showing plate holding parts p. 50 n. 5 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 099
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Chronograph invented by Professor John Locke in museum at United States Naval Observatory p. 37 n. 26 USNOA-2021-015 USNO Glass Plate Publication Images Plate 098
Topics: USNO, chronograph, John Locke, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Auxillary apparatus for Prin Transit Instrument motor drive (1st form) p. 37 n. 29 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 097
Topics: USNO, Prin Transit Instrument, glass plate
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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Repsold Micrometer copy from prints from Professor Asaph Hall p. 59 n. 13 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 096
Topics: USNO, micrometer, Asaph Hall
United States Naval Observatory Library & Archives
Oct 22, 2021 United States Naval Observatory
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South Transit Instrument p. 17 n. 5 v. Xa USNOA-2021-015 USNO Glass Plate Publication Images Plate 095
Topics: USNO, glass plate, transit instrument
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Ventilating system prime vertical transit p. 49 n. 5 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 093
Topics: USNO, telescope, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Prime Vertical transit tube vertical about 1902 p. 49 n. 7 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 092
Topics: USNO, telescope
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Seven astronomers standing on the front steps of Building 1 of the United States Naval Observatory.  USNOA-2021-015 USNO Glass Plate Publication Images Plate 090
Topics: USNO, astronomers, Washington DC
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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J.E. Willis and 6-inch Transit Circle Aug 11, 1933 p. 7 n. 17 v. 3 USNOA-2021-015 USNO Glass Plate Publication Images Plate 089
Topics: USNO, Transit Instrument
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Bust of Maury (before and after lettering) 1932 April 19 p. 5 n. 16 v. 2 USNOA-2021-015 USNO Glass Plate Publication Images Plate 088, 142, 143B
Topics: USNO, Maury, Matthew Fontaine Maury, Oceanography, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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10" photo tel. p. 50 n. 2 v. 9 USNOA-2021-015 USNO Glass Plate Publication Images Plate 087
Topics: USNO, telescope
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Corona (Solar) Kepiang eclipse Jan 14-19 1926 65 ft camera plate XII p. 60 USNOA-2021-015 USNO Glass Plate Publication Images Plate 086
Topics: USNO, solar eclipse, corona, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Grinding and Polishing Machine photo house about 1909 p. 51 n. 8 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 085
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Grinding and Polishing Machine photo house p. 51 n. 7 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 084
Topics: USNO, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Driving Mechanism longitude transit instrument. Dec 1915 p. 37 n. 30 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 083
Topics: USNO, Transit Instrument, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Photo of Moon. Lick Observatory. Age 9 days 2.5 hours p. 58 n. 7 v. 13 USNOA-2021-015 USNO Glass Plate Publication Images Plate 082
Topics: USNO, Lick Observatory, Moon
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Mr. Watts p. 7 n. 14 v. 3 USNOA-2021-015 USNO Glass Plate Publication Images Plate 081
Topics: USNO, astronomer, CB Watts
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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West 6-inch Transit Circle looking SE Nov. 1899 p. 43 n. 9 v. 8 USNOA-2021-015 USNO Glass Plate Publication Images Plate 080
Topics: USNO, Transit Instrument, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Corona during Solar Eclipse, from Kepiang (?). Jan 14-19, 1926 65ft lens p. 60 USNOA-2021-015 USNO Glass Plate Publication Images Plate 079
Topics: USNO, solar eclipse, corona, glass plate
United States Naval Observatory Library & Archives
Oct 21, 2021 United States Naval Observatory
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Chronograph p. 37 n. 27 v. 11 USNOA-2021-015 USNO Glass Plate Publication Images Plate 076
Topics: USNO, Chronograph, glass plate